Snowplow



Dec. 4, 1928. l 1,694,174

. R. C. GREENWOOD v SNOWPLOW v Filed July 16, 1926 2 Sheets-finest lfiymorzo C. Gav/awed Afro/5w: rs.

Patented Dec. 4, 1928'."

UNITED STATES PATENT, OFFICE.

RAYMOND C. GREENWOOD, OF KENNETT SQUARE, PENNSYLVANIA, ASSIGNORIEOAMERICAN ROAD. MACHINERY COMPANY, INC., OF KENNETT SQUARE, PENNSYL-VANIA, CORPORATION OF DELAWARE.

suowrnow.

Application filed. July 16,

My invention relates to snow plows and more particularly to snow plowsof the type adapted to be secured in front ofa motor truck or tractorfor use in cleaning snow from streets and highways.

Plows of the character to which my invention pertains, and particularlythe blade type, have proved of great value, in connection with theremoval of snow from city streets and in maintaining highways open, thechief advantage of such'plows being their adaptability to a convenientand otherwise useful source of power, as a tractor or truck, and becauseof the relatively high speed at which they may be operated witheflieiency.

Such plows, while, as indicated, of great advantage, are, especiallywhen built in the smaller sizes, open to certain objections among whichmay be mentioned thatthe plow has a tendency to bounce off the ground,its weight being insufficient to hold it down, thus materially reducingits efliciency.

Now it is the object of my invention to provide a plow of the characterindicated,

but which will be so constructed as to practically eliminate thetendency to bounce and insure the plow remaining on the ground,irrespective of the weight of'the plow. Thus, by virtue of myinvention,a comparatively small, light plow may be produced Which will operatewith a high degree of efliciencysuperior to that of the present largerplows and a large plow of increased efliciency may be produced.

Having now indicated, in a general way, the nature and purpose of myinvention, I will proceed to a detailed description there- A of withreference to the accompanying drawings in which there is illustrated apreferred embodiment of my invention, and in which:

Fig. 1, is a side elevation of a snow plow embodying my invention, shownin association witha tractor diagrammatically illustrated.

Fig. 2, is a plan View of portions of the plow shownin Figure 1. I

Fig. 3, is a front View of the subject of Figure 1 partly in section.

In the drawings, a indicates diagrammatically the forward portion of atractor having a front axle b. 'Longitudinallyon opposite sides of thetractor are positioned side frame members 0 of a main frame which aresecured to the front axle of the tractor by means 1926. "Serial No.122,839.

of clips d. The frame members a are connected at the rear of the tractorby a trans- Verse member secured in a suitable way to the tractor drawbar.

- Pivotally secured to the forward ends of frame members a by means of apine, are

'the rear ends of apair of side members f of members f, its endsextending beyond the members f and being provided with holesj.

The crosspiece z is secured to the members 7 by means of gusset platesla which are so formed as to tilt the piece 2' backwardly, as shown'inFigure 3.

A pair of upright supports 1 carried on pivot pin e extend upwardly fromthe forward ends of frame strut members 0 and are braced by members msecured to members 0.

The supports Z serve to carry a shaft n, which carries a worm wheel 0and uponopposite ends of whichare secured cranks p.

A worm g, on the end of a shaft r, is suitably supported in operativerelation with through a universal joint 8 with a shaft t, which may beprovided with a hand wheel or suitably connected to mechanism fordriving it from the tractor power plant.

To the cranks p are connected the ends of rigid rods u, the other endsof which extend through the holes in cross piece-i. Springs 7) arepositioned on rods u above and'below cross piece 2' and bearthereagainst, being retained under tension respectively by means ofstops w, adjustabl secured to the rods u.

In the operation of the plow, it will be obvious that the blade. ispropelled by the tractor, or any other suitable source of power as amotor truck and the blade is held fromthe worm wheel 0, shaft 1' beingconnected and the plow will be raised and lowered and the springs 11 onrods u beneath the cross piece i will act as resilient connectionsbetween the rods u and. members 7". When the plow is in operativeposition, the sprin s '0 above the cross piece 2' will act against therigid rods u to yieldingly prevent theplow frombollncing and finally onbeing compressed to a maximum act as a stop against upward movement ofthe plow.

It will be understood that where in the claims hereto appended I referto a tractor, I mean to include a motor truck or other suitable sourceof ower. I

Having now ful y described my invention, what I claim and desire toprotect by Letters Patent is 1. A main frame for a snow low comprisingtwo side members, means or connecting the side members to a tractor, anauxiliary frame having two side members pivotally connected at theirrear ends to the'side members of the main frame, a gusset plateconnected to each of the side members of the auxiliary frame, across-bar connected to the gusset plates and extending beyond the sidebars of the auxiliary frame, said cross-bars having openingstherethrough adj acenttheir ends, means for pivotally connecting asnow2-. A sup orting frame for supportinga I snow plow rom a tractorcomprising a main frame arranged to be connected to the tractor, saidmain frame having two side bars, an up right bar connected to each sidebar, a rigid strut connecting the upper end of each upright to its sidebar, an auxiliary frame havingtwo side bars formed of an le iron havingvertical and horizontal we s, the horizontal webs being cut awayadjacent the ends of the bars, there being openings through each end ofeachof the side bars of the auxiliary frame, means for pivotallyconnecting the rear ends of the side ars of the auxiliary frame to theside bars of the main frame. through two of said openings, a snow plowpivotally connected to the o nings in the other ends of the side bars 0the auxiliary frame, a gusset plate connected to the horizontal flangeof each of the side bars of the auxiliary frame, an angle bar connected.to the gusset plates and extending beyond the side bars of theauxiliary frame, hoisting mechanism supported by the upright on the mainframe, andiactuating rods connected to the hoisting mechanism endextending through openings in the ends of the angle bar connected to thegusset plates.

In testimony of which invention, Ihave hereunto set my hand, at KennettSquare, Pennsylvania, on this 1st day of July, 1926. RAYMOND C.GREENWOOD.

